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Based in the West Midlands, we carry out servicing of the UK's leading manufacturers of rainwater harvesting tanks, including Kingspan and Graf. With over 25 years experience in rainwater solutions, we've built up specialist expertise and take real pride in delivering excellent customer service.

Rainwater harvesting tank service


At Cotterill Environmental, our experienced service engineers have over 25 years in the industry and are highly knowledgeable when it comes to all things rainwater harvesting.


We are accredited with leading manufacturers such as Kingspan and Graf, so you know your rainwater harvesting tank is in safe hands. When maintained properly, rainwater harvesting tanks can last for years, even decades.


Call our team today to arrange your service!

What are the applications of a rainwater harvesting tank?

Rainwater harvesting is the practice of capturing rainwater from the roof and guttering, to store it in a tank for the purpose of redistribution. Some tanks can even treat the water to make it into drinking water. Rainwater can be repurposed in a number of applications, including:

  • Garden irrigation

  • Sprinkler systems

  • Pressure washing

  • WCs 

  • Washing machines


Harvesting rainwater has many benefits, and is an eco-friendly process. The rainwater would have otherwise gone to waste, which means it is put to good use. Using rainwater will also reduce your mains water bill. 

Benefits of our service package

Peace of Mind

Get peace of mind that your system is maintained correctly and minimise the risk of unexpected breakdowns and costly repairs!

Service report provided

We provide you with a service report after each visit to let you know how the rainwater harvester is functioning and include detailed photos.

Prolong your system

A rainwater harvesting system is a big cost outlay. Prolong the life of your system and ensure you get the best return from your investment 

Reminders so you don't forget

It's easy to forget so we will send you reminders when your service is due, providing you with even more peace of mind.

Meet your legal requirements

It's a legal requirement to ensure your system is regulation compliant. 

Fast repairs when needed

Most repairs are done during a service or breakdown call out as we keep a record of your system and carry spare parts for your system with us.

Why use us?


Top rated customer service

We’ve built up a reputation for being friendly, professional and 100% reliable. You can count on us for excellent service.


We know our stuff

 Our 30 year proven track record of installing wastewater solutions speaks for itself. We're specialists when it comes to the installation, maintenance and repair of sewage systems



Integrity and honesty are core to what we do. We're a family-owned business and are known for being trustworthy and hard working.

            Contact us today for advice 

            0121 461 4861 

Useful information on rainwater harvesting tanks

Here are some frequently asked questions about why the maintenance of rainwater harvesting tanks:

Why is it important to service your rainwater harvesting tank?

It is essential to keep your rainwater harvesting tank regularly maintained for a number of reasons.

1. Firstly, annual servicing will ensure that your tank is fit for purpose, and functioning properly. This means that you will make the most out of your tank, and give you peace of mind that it is safe to use for another year.

2. The water quality is maintained, as any blockages, leaks or faults can be identified and rectified.

3. The risk of costly repairs later down the line will be reduced, as the rainwater harvesting system will be properly maintained.

4. Our experienced service engineers can also identify if the system is regulation compliant or not, which is essential to its use and function. 


How often should you service your rainwater harvesting tank?

This will depend on the size of the tank, and its designated uses. For domestic tanks, every 6-12 months is sufficient, however larger commercial tanks will need servicing every 3-6 months.

What are the benefits of rainwater harvesting? 


There are many practical benefits of rainwater harvesting, as the tank can apply rainwater to a number of applications. 


  • Repurposing rainwater will save you money on your water bill, as the demand for mains water is reduced. Rainwater can be used for a number of applications inside and outside of the home, including garden irrigation, flushing toilets and washing laundry. By harnessing rainwater as a natural resource, a reduction of rainwater supply will be reflected in your water bill. Although the tank is a large initial investment, it is cost-effective due to providing long term cost savings on your water bill. 

  • Rainwater harvesting is an environmentally-friendly practice, as it makes use of a natural resource and conserves water. It will reduce the likelihood of flooding, as excess rainwater is captured inside the tank, which diverts it away from vulnerable areas. 

  • In the instance of a drought or water scarcity, a rainwater harvesting tank will provide water and reduce the reliance on mains water systems. This will make us as a community more resilient to changing weather conditions.

What are the applications of a rainwater harvesting tank? 

Rainwater harvesting tanks are an excellent investment, as they can have many different applications. Not only will this save you money on your water bill, but it’s great for the environment too. 


Applications include:

  • Sprinkler systems

  • Garden irrigation 

  • Pressure washing 

  • WC’s

  • Washing laundry

What areas do we cover? 

We cover the whole of the midlands and can also work further afield depending on the drainage project. Areas in the midlands that we cover include: 

Birmingham (West Midlands), Coventry (West Midlands), Hereford (Herefordshire), Lichfield (Staffordshire), Stoke-on-Trent Staffordshire), Wolverhampton (West Midlands), Worcester (Worcestershire), Shrewsbury (Shropshire), Warwick (Warwickshire), Derby (Derbyshire), Leicester(Leicestershire), Oakham (Rutland), Lincoln (Lincolnshire), Nottingham (Nottinghamshire), Buxton(Derbyshire), Glossop (Derbyshire), Cleethorpes (Lincolnshire), Northampton (Northamptonshire), Tamworth, Sutton Coldfield, Solihull, Lapworth, Knowle etc.  

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